potassium hydroxide 1.) 50 deg C, 3 h, 2.) reflux, 3 h; Yield given;

1: 1 M methanol. KOH / 1.) 50 deg C, 3 h, 2.) reflux, 3 h 2: butyllithium / 1.) THF, hexane, RT, 0.5 h, 2.) 0.5 h View Scheme